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All Journal Jurnal Teknik Mesin Journal of Engineering and Technological Sciences Jurnal Energi dan Lingkungan (Enerlink) ASEAN Journal of Community Engagement
Adi Surjosatyo
Departemen Teknik Mesin, Fakultas Teknik, Universitas Indonesia, Depok
Aerospace Engineering Automotive Engineering Control & Systems Engineering Economics, Econometrics & Finance Education Energy Engineering Industrial & Manufacturing Engineering Materials Science & Nanotechnology Mechanical Engineering Public Health Social Sciences Other

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SOLUTION CONCERNING CLIMATE CHANGE AND UTILIZATION OF WIND TURBINE AND FLOATING PV IN COASTAL AREA Sofianita, Rifka; Surjosatyo, Adi; Siregar, Sri Rachmawati
ASEAN Journal of Community Engagement Vol. 3 No. 2 (2019)
Publisher : UI Scholars Hub

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Abstract

The global average sea level is rising at a rate of 3.2 mm per year according to recent observations of the IPCC. One of the main factors in sea level rise is thermal expansion, where greenhouse gases, especially CO2, accumulate and generate heat (climate change), thereby melting glaciers in the polar regions. Two villages in Kampung Bungin Bekasi, Indonesia, have already been experiencing flooding. Climate change can be addressed by environmental conservation and utilization of renewable energy to reduce CO2 production. Environmental conservation can be conducted by planting mangroves, while renewable energy is achieved by using natural renewable resources. Planting 10,000 mangrove seeds through citizen participation and by researchers from the University of Indonesia could create a new coastal ecosystem, which could prevent abrasion and become the habitat of sea biota. Renewable energy based on wind power and solar cell such as wind turbines and photovoltaics (PV) has been installed and used for streetlights, mosque lamps, and freezers. The wind turbine used in this study is made from wood, which is easy to obtain, and is designed to be compatible with the characteristics of Bungin Village, with a capacity of 500 Wp per unit. The total capacity of PV is 1800 Wp, which includes 720 Wp floating PV capacity and 1080 Wp PV monocrystalline capacity. Floating technology is chosen because the coastal areas have limited available land and the soil condition (sand) is inappropriate as a foundation for PV. The installed renewable energy is integrated and completed with a battery system and online monitoring to monitor the site in real time anytime and anywhere.
Improvement of Tar Removal Performance in Biomass Gasification Using Fixed-Bed Biomass Filtration Hafif Dafiqurrohman; Dadan Kosasih; Arief Wildhan Naro Putra; Muhammad Ismail Bagus Setyawan; Adi Surjosatyo
Journal of Engineering and Technological Sciences Vol. 52 No. 4 (2020)
Publisher : Institute for Research and Community Services, Institut Teknologi Bandung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.5614/j.eng.technol.sci.2020.52.4.7

Abstract

Several studies have proven the efficiency of gasification as a thermal process in terms of material decomposition and chemical energy. Synthetic gas (syngas) is a gasification product that can be used as an energy source. However, it needs to undergo treatment to remove the tar content, which could cause several issues in the combustion system. Tar removal can be conducted through biomass filters. In this study, three types of filters were investigated: biochar, rice straw, and rice husk filters. Three thicknesses of the porous media (30, 40, and 50 cm) were investigated. The results revealed that porous media thickness significantly affects tar removal efficiency, as the efficiency was found to increase with the thickness. Biochar was proven to be the best filter media among the three types, with a tar removal efficiency of 59.45% at a thickness of 50 cm.
Pembakaran Gas Hasil Gasifikasi Biomassa di Premixed Gas Burner dengan Metoda 3D Computational Fluid Dynamic Adi Surjosatyo
Jurnal Teknik Mesin Vol. 12 No. 1 (2010): APRIL 2010
Publisher : Institute of Research and Community Outreach - Petra Christian University

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Abstract

The depletion of worlwide energy reservation and environmental issue caused by fossil fuel pollution urge mankind to find a suitable alternative energy to overcome this problem. Producer gas from biomass gasification is an example of an alternative energy that could substitute fossil fuel in a certain combustion operation. Using producer gas to generate heat needs gas burner system that can produce an effective gas flame with low emission gas. This study is using modeling and simulation of gas flame using 3D-CFD method. The gas burner model has two condition, namely, using conical flame stabilizer and without conical flame stabilizer, and the velocity tangential air supply is varied into three speed of 3 m/s, 6 m/s and 9 m/s, respectively. The result of this simulation shows the additional of conical flame stabilizer produces a shorter flame, increases flames stability and reduces CO emission. The experimental result shows a similar pattern compared with that of the simulation result. Abstract in Bahasa Indonesia: Dengan menipisnya cadangan minyak dunia dan masalah lingkungan yang diakibatkan oleh pembakaran bahan bakar fossil, maka diperlukan energi alternatif dalam mengatasi hal tersebut. Bahan bakar gas dari proses gasifikasi biomassa (producer gas) adalah salah satu energi alternatif yang dapat menggantikan bahan bakar fosil. Pemanfaatan producer gas untuk aplikasi pengeringan dan pemanasan boiler memerlukan suatu sistem gas burner yang dapat menghasilkan panas tinggi dan polusi rendah. Pada penelitian ini sebuah model gas burner berbahan bakar producer gas dilakukan pemodelan simulasi secara 3D menggunakan CFD. Simulasi dilakukan dengan menggunakan swirl gas burner dengan menggunakan conical flame stabilizer dan tanpa menggunakan conical flame stabilizer pada variasi kecepatan udara masuk tangensial 3 m/s, 6 m/s dan 9 m/s. Hasil simulasi menunjukkan penambahan conical flame stabilizer menghasilkan api yang lebih pendek dan stabil. Penambahan kecepatan udara memendekkan panjang api dan menurunkan temperatur api. Validasi eksperimental dilakukan pada gas swirl burner yang menggunakan conical flame stabilizer. Simulasi dan eksperiment menunjukkan hasil yang tidak jauh berbeda. Kata kunci: CFD, producer gas, gas burner, conical flame stabilizer.
Simulasi dan Eksperimental Isothermal Aliran Eksternal Resirkulasi pada Up-Draft Gasifier Fajri Vidian; Hery Prabowo; Yulianto .; Adi Surjosatyo; Yulianto Sulistyo Nugroho
Jurnal Teknik Mesin Vol. 13 No. 1 (2011): APRIL 2011
Publisher : Institute of Research and Community Outreach - Petra Christian University

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Abstract

Gasification process at updraft gasifier produces greater amount of tar than other type of gasifier. To reduce tar at updraft gasifier, the pirolysis gas will be re-circulated to combustion zone and to exhaust gas from reduction zone. Recirculation of pirolysis gas to combustion zone can be carried out by using ejector. Ejector is an equipment used to inject the secondary fluid flow by the movement of momentum and energy from high speed primary flow (jet). The research conducted with isothermal 3D simulation using CFD and experimental investigation of recirculation flow using ejector at updraft gasifier. Ejector velocity for simulation and experimentation is constant at 0.6 m/s. Ejector’s nozzle exit position (NXP) direction will be varied. The goal of this research is to obtain information of optimal nozzle exit position for producing maximum velocity of gas recirculation. The result of simulation and experiment shows that the change of nozzle exit position direction to – x axis from zero point, it will give maximum velocity of gas recirculation flow with the optimum position of nozzle exit position at the range of -3 to -4 cm from zero point.
KARAKTERISASI PEMBAKARAN BATUBARA HALUS DALAM LINGKUNGAN UDARA DAN OXY-FUEL Cahyadi Cahyadi; Dwika Budianto; Adi Surjosatyo; Yulianto S. Nugroho
Jurnal Energi dan Lingkungan (Enerlink) Vol. 10 No. 1 (2014)
Publisher : Badan Pengkajian dan Penerapan Teknologi

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29122/elk.v10i1.4307

Abstract

PREDIKSI KARAKTERISTIK PEMBAKARAN OXY-FUEL DENGAN PEMODELAN CFD Dwika Budianto; Cahyadi Cahyadi; Adi Surjosatyo; Yulianto S. Nugroho
Jurnal Energi dan Lingkungan (Enerlink) Vol. 10 No. 1 (2014)
Publisher : Badan Pengkajian dan Penerapan Teknologi

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29122/elk.v10i1.4310

Abstract

Performance Evaluation of a Continuous Downdraft Gasification Reactor Driven by Electric Motors with Manual Mode of Operation Rachman Setiawan; Hanif Furqon Hidayat; Hafif Dafiqurrohman; Adi Surjosatyo; Radon Dhelika
Journal of Engineering and Technological Sciences Vol. 54 No. 4 (2022)
Publisher : Institute for Research and Community Services, Institut Teknologi Bandung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.5614/j.eng.technol.sci.2022.54.4.5

Abstract

Gasification is considered a promising option for harnessing energy potential from agricultural waste, such as rice husks. This paper presents a 10-kW rice husk fixed bed gasifier system. This system is an improved version of a prototype previously developed by our research group. Some of the optimized features added to the gasifier include the use of a circular air intake, an improved gas cleaning system, and electric motors that are regulated by a programmable logic controller. Keeping the gasifier system’s operation stable is critical for producing high-quality synthetic gas (syngas). Therefore, performance evaluation of the presented gasifier system was conducted, and the resulting syngas outputs were analyzed. The evaluation also included an investigation into the performance of the motors, particularly those used for feeding and char removal, which are critical components of the system. The results showed that the improved gasifier system was stable with a proper feedstock. A discussion of the parameters affecting the composition of the synthetic gas is also presented.
Co-Authors Arief Wildhan Naro Putra Cahyadi Cahyadi Cahyadi Cahyadi Dadan Kosasih Dwika Budianto Dwika Budianto Fajri Vidian Hafif Dafiqurrohman Hafif Dafiqurrohman Hanif Furqon Hidayat Hery Prabowo Muhammad Ismail Bagus Setyawan Rachman Setiawan Radon Dhelika Siregar, Sri Rachmawati Sofianita, Rifka Yulianto . Yulianto Sulistyo Nugroho